Tourniquet



F. R. DAVIS. TOURNIQUET. man OCT. 4, 1922.

Mar. 13, 1923.

IN VEN TOR ATTORNEY Patented Mar. 13, 1923..

same area FRAN 'K RUTLYEDGE DAVIS, OF SGABSDALE, NEW YORK.

'roonmoom.

Application filed October 4, 1922. SerialNo. 592,237.

and removed, which will be capable of easy.

adjustments to fit various requirements: and which will require no special skill in 1ts handling. I

' In the accomplishment of the foregoing and other objects I have evolved, a novel construction, combination and relation of parts, a practical example of which is disclosed in the accompanying drawing, wherein Figure 1 is a plan view showing the ends of one of the tourniquets as approached, preparatory to connecting them together.

Figure 2 is a longitudinal sectional view showing the parts as engaged in the first or coupled position, and

Figure 3 is a side elevation showing the parts interlocked in the final secured relation.

In the illustration, the strap or band 5 which forms the body of the tourniquet is fixedly connected at one end with the end bar 6 of-a frame, and has a sliding co-nnec t-ion with a lever which is adapted for pivotal engagement with the frame.

For the'purpose of a sliding, adjustable connection with the tightening lever, the strap is passed over a fiat bar :7 extending at an intermediate point between the sides 8 of the lever frame, in the form of a loop about a rounded cross bar 9 at the end of the lever frame and beneath a fiat cross bar 10 at the opposite end of theframe.

This last-mentioned bar is located at the free swinglng end of the "lever and serves as a convenient handle foroperating the.

lever. As shown in Figure 2 the two flat intermediate and end bars '7 and 10 are spaced apart a distance somewhat less than the double thickness of the strap so as to deflect the two sides of the loop out of the straight path and cause more or less.

the strap to bind At the end of the lever, where the strap is looped about the rounded cross bar 9 locking studs;

there are provided pivot studs 11 project- 1 ing outwardly beyond the Sidesofthe frame whichstuds may in fact constitute outward extensions of the cross bar 9. v 5 p The frame which constitutes the pivotal mounting for the tightening lever isshown as constructed with upstanding sides 12 spaced to receive the lever between them and braced rigidly apart by'the end bar 6 andtwo intermediate braces13, 14:. The lower or inner edges of these sides and the braces 13, 14 may be arranged on an easy curve, as

indicated in Figures2and 3.

The pivot studs 11- at the endof the tightening lever seat in openbe'arings l5 pro-' vided in the upper edges of the frame sides" 12, and the lever'is held in the strap tighten-Q ed position by the engagement of outstanding lugs 16 at the free end of the lever engaging beneath overstanding shoulders 17 formlng part of the open bearings 18 in the i sidesof the framepositioned to receive such The two .parts described thus I constitute inv their general effect the elements of a buckle having a tongue which can be turned over totighten the strap,-

The strap (and whichis engaged with the leverv may be passed beneath a bar 19 at' the end of the frame opposite that to which the strap is permanently attached and this enable the en agement ofthestrapbeneath the same whi e the lever remains, attached i to the strap.

bar is shown as having a gap 20'therein' to. i

By making the lever and its :baseas two I completely. separate but. readily engageable parts, each connected with an. end of the strap, it is possible to apply the tourniquet very easily, by, simply passing ,the two ends about the injured member, slipping the lever end of the strap edgewise through the gap in the end of the base and then hooking the rovided therefor inthe base. As shown in, igure 2 theiparts are then coupled to; gether, but in such a way that the main slack canbe taken up by simply pullingonpivot studs of the lever in'theopen bearings the free end of the strap at 5 this because I of the fact that in such'position the strap extends as a simple loop about the rounded bar 9, and 'is free to pass between the inter,- mediate and end bars 7 and .10,v Afterthis preliminary slack has been taken .up the leveris turnediover, asindicated in dotted lines in Figure 2, into the fully reversed the pull will come on the locking studs and so make the lock the more secure.

In turning over the lever in the strap tightening operation, the end of the strap at 5 may be used as a convenient hand-' hold, it bending about the edge of the cross bar 10. as shown in the dotted lines in Figure 2. This prevents slippage of the strap while the lever is turning over and until the strap becomes firmly held by the reverse bend over the intermediate bar 7, which is effected in the turning over oi the lever. This abrupt bendingof the strap over the bar 7 indicated at 5 in Figure 3,

coupled with the fact that the tensioned strap overlies the loop about the bar 9, at

5, effectually prevents any slippage of the strap through the lever when the lever has been turned to its locked position. If it is desired to release the tourniquet at any time this is easily done either by grasping the protruding end of the strap or the end of the lever at 10 and swinging back the lever in the reverse direction, that is, toward the right in Figure 3.

The connecting means or this invention will be seen to consist of but two parts which though relatively light and simple can be made rigid and strong enough to carry their respective loads and which can each be readily made in a single piece, as by molding, casting,'pressing or the like.

What I claim is:

1. In a tourniquet, a strap holding base and a strap tightening lever detachably engageable therewitlnsaid lever having spaced bars with a strap having coopeiatingreversely extending loops doubled over the same, whereby said strap can bev frictionally secured in different adjustments, said. lever further having pivotal engagement near one of its ends with the base and hav ing means adjacent its opposite or free end for interlocking engagement with cooperating holding means on the base.

2. In a tourniquet, a strap holding base having upstanding sides spaced to receive a tightening lever therebetween and provided with open bearing sockets and locking sockets spaced apart in the upper edges thereof, a strap tightening lever detachably engageable with the base between the upstanding sides and having bearing lugs at one end for engagement in the bearing sockets and locking shoulders spaced therefrom to snap into the locking sockets, said lever having transversely arranged spaced rigid bars adapted to :trictionally retain a strap looped thereover.

3. The device of claim 1 with the strap connected with one end of the base, the base having a transverse bar adjacent its opposite end, having a' gap for the ready passage of the strap.

4. In a tourniquet, agtrame having a cross bar at one end for the attachment of a strap and a cross bar at the opposite end having a gap therein, said frame having upstanding sides with hearing sockets and locking sockets'spaced longitudinally from said bearing sockets and a lever frame having spaced sides connected at one end by a strap holding bar and at the opposite end by a finger-hold,said lever further having an inter mediate strap engaging bar between the end bar and finger-hold with pivot pins substantially in ii -e with the. end bar for engage ment in the bearing sockets and locking shoulders for engagement in the locking sockets.

-5. The structure'of claim 1 in which one of the strap holding bars of the lever is located adjacent one end of the lever and has a rounded edge for a loop of the strap to slide thereover and in which another strap holding bar is substantially flat and is lo cated near the opposite end of the lever.

6. The structure of claim 1 in which the base has a strap engaging bar provided with a gap for the ready passage of the strap.

7. The device of claim 2 with the hearing sockets and locking sockets spaced more locking lugs on the lever.

8. The device of claim 2 with the bearing sockets and locking sockets spaced more widely apart than the bearing lugs and looking lugs on the lever and in which the look bearing sockets and open locking sockets spaced theretroin, shoulders partly overastanding said locking sockets and a straptightening lever having means for adjustably securing the strap thereto with bearing lugs detachably engageable in the open bean ing sockets and lockin shoulders positioned to ride over the shoulders oil? the locking sockets and into seated engagement in the locking sockets as thestraptightening lever is swung over to tighten the strap.

11. In a tourniquet, a strap-holding base and a strap-tightening lever pivotally e11- gaged therewith, said lever having a trans- 'widely apart than the bearing lugs and verse bar near its pivotal axis and a second when the lever is swung in a direction to transverse bar spaced therefrom and reloop the strapabout the second bar, the strap moved from the pivotal axis, with a strap will be frictlonally held. I passed over the second bar and looped about In witness whereof, I have hereunto set 5 the first bar whereby in one position of the my hand this 26th day of September, 1922.

lever the strap will slide freely over said bars for purposes of adjustment and whereby F. RUTLEDGE DAVIS. 

